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> the ability to scribble notes, turn back the page to re-read something to double-check without much effort.

I agree 100%. The simple act of turning back the page/pages is so fast and efficient. My brain seems to even remember where on the page the info I want is. So much more is visible in a single 'eye-shot'. I don't get that same mental experience with e-docs - not sure why. I did grow up with paper so there is a bias.

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I had not thought about the paging-back issue until you mentioned it, but I recognize in myself what you have said about it. Our brains and sensorimotor systems are developed for direct interaction with the physical world, not through proxies (though we can get pretty good with decent proxies through practice.)

On the other hand, being able to search is invaluable, as is the ability to have the footnote pages open in a separate window, if the software does not provide a better option. Finally, I can't imagine a good interface that is not pencil-like for sketching diagrams.

I agree. For novels, digital works well—I have hundreds of books on my Kindle. But recently, while studying a math book, I bought the paperback for exactly the reason you mentioned.

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